trimDanglingAssistantToolCalls in the provider router held the same
consecutive-tool-message assumption as the replay projector: when a
model emits function_call items before explanation text within one
response (e.g. gpt-5.3-codex-spark), the sanitized sequence becomes
assistant[tool_call] -> assistant[text] -> tool[result] and responded
calls were stripped at the provider boundary even though the projector
already replayed them correctly. The orphan tool result then forced the
Responses adapter to synthesize a placeholder function_call with empty
arguments, degrading the arguments the model sees on in-loop requests.
Widen the response collection window to skip interleaved plain
assistant text messages and drop orphan tool results, mirroring the
projector fix.
trimReplayDanglingAssistantToolCalls only collected tool results that
immediately followed the assistant tool-call message. Models such as
gpt-5.3-codex-spark may emit the function_call item before the
explanation text within one response, so history replay order becomes
assistant[tool_call] -> assistant[text] -> tool[result]. The call was
misjudged as dangling and stripped while the tool result survived,
producing a function_call_output without a matching function_call that
the Responses API rejects with 400.
- widen the response collection window to skip interleaved plain
assistant text messages, and drop orphan tool results in the same pass
- synthesize a placeholder function_call (or drop the output when the
tool name is unknown) in normalizeOpenAIResponsesInput so conversations
already persisted with corrupted history can resume
- Deleted outdated test files for OpenAI endpoint functionality.
- Improved the OpenAIEndpointURL function to better handle custom paths and version segments.
- Introduced a new helper function, stripEndpointVersionPrefix, to streamline endpoint processing.
- Introduced a new endpoint option for OpenAI integrations, allowing users to specify a custom path.
- Updated relevant components and validation logic to accommodate the new endpoint.
- Enhanced documentation and error messages to reflect the addition of the custom endpoint option.